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(NoModeL) G. R. UHLMAN'N.

. LOOK.

No. 350,573. Patented Oct. 12, 1886'.

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N- PETERS, Fholo-Liihagnphcr. Washington, a. c.

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UNITED STATES PATENT OFFICE.

CHARLES R. UHLMANN, F PEORIA, ILLINOIS.

LOCK.

SPECIFICATION farming part of Letters Patent No. 350,573, dated October 12, 1886.

Application filed July 24, 1886. Serial No. 208,913. (No model.)

' of Peoria, in the county of Peoria, State of Illinois, have invented an Improved Lock; and I do hereby declare that the following is a full, clear, and exact description thereof.

The object of this invention is the construc: tion of improved devices for securing the bolt of a door-lock, and so closing the keyhole as not only to prevent sight therethrough, but keep the key from being turned.

This invention is in fact an improvement over a patent of mine dated August 17 1886,

In the drawings connected with this application, Figure/l is an interior view of apart of a rim-lock, showing the bolt protracted and secured by my device. Fig. 2 is a section at x in Fig. 1. Fig. 3 exhibits a modified arrangement of the device; Fig. 4, view of slot through lower rim of the lock-case; Fig. 5, modified form of said slot.

The lock-case L, having its front plate re moved, shows the bolt D and the key M. My device for closing the keyhole and holding the key M consists of the securing-block A, adapted to be moved upon the lower rim, L, of the lock-ease L by means of the button E, whose stem E projects below said securingblock through a slot in said rim. One end of the securing-block A is formed with the slop- .ing face G and with the depression 0, said sloping face being designed to support the web of the key, while said depression makes room for the stem of the key, so that said end of the securing -block can be moved entirely across the key-hole. Thus not only is the key M prevented from being turned toward the securingblock, but the key-hole is so tightly closed as to keep any one from seeing through the same. By providing the bolt D with a shoulder, D, adapted to engage with a portion of the securing-block, as in Fig. 8, said bolt, as well as the key, cannot be unlocked.

In-Fig. 1 I show the securing-block A placed in the lock-case L at the side of the key-hole opposite to the position thereof previously described. In this case it is not necessary to have the said block and the bolt provided with means of engagement, since the key is prevented by the securing-block from approaching the bolt tounlock it. The securing-block,

in addition to keeping the key from being turned, so completely covers the key-hole as to prevent the insertion therein of any wire or tool by which to reach and disturb the look.

In the arrangement of the securing-block shown in Fig. 8, the shoulder D of the bolt and the shoulder B of the securing-block serve by their engagement, when the bolt is locked and the said block fastened, to prevent the bolt trom being retracted. The securing-block I does not, however, keep the key fromcoming in contact with the bolt. It simply does not permitthe bolt to be moved, while theimproved construction of Fig. l keeps the key from the bolt.

To fasten the block A in either its securing position or that of disengagement, I provide the stem E of the button E with the shoulder E adapted to be moved through the enlarged terminal portions of the slot F in the rim L of the lock-ease, but too large to pass the con traeted central portion or neck F.

In Fig. 2 the button E is shown elevated sufficiently to bring the shoulder E above the rim L of the case. When thus elevated, the portion of the stem E below said shoulder, being made slender enough, can easily enter the neck of the slot F, and, therefore, there is nothing to prevent the securingblock from being moved back and forth upon the rim L. As soon, however, as the button E is lowered the shoulder E enters the slot F at either enlarged end, and, being unable to pass the neck F, locks the block A ineither of the desired positions.

The stem E of the button can be adapted to be vertically movable in recesses in the arm A of the securing-block and to be depressed by gravity, as in said prior application of my own. I prefer, however, to aid the lowering of the button E by means of a spring, and to locate the stem E in the body of the securingblock. This I do by forming the vertical transverse slot A in said block and the vertical passage A through the under side of the block into said slot, said passage being fitted to admit the shouldered portion of the stem E. The upper part of the stem E is formed into the slender pin E whose end enters a vertical pin-hole through the upper wall of the slot A A spiral spring, S, being mounted on said pin E", and abutting against the shoulder E of the stem and the upper wall of the slot A", is thereby adapted to impress the button in the desired downward direction. A small cross-pin, E, inserted transversely through the upper part of the shoulder E", prevents, by its engagement with the under wall of the slot A the stern of the button from dropping out of place.

In using my lock, the key being inserted and the bolt shot thereby into engagement with the (lOOlFjtllllb, allthat is necessary to dois simply to press up on the button E, and while thus pressing move it sidewise toward the key. hen the button cannot be moved further, the button is released and, locking itself, the securing-block A is found to be immovable and the key firmly fastened. From the under side of the securing-block A projects the rib A fitting loosely in the slot F, the object of the same being to steady the movement of the block. Laterall y from the said rib project the shoulders A, secured thereto by pins or in any suitable way, and designed for keeping the block A from rising from the rim. I often, however, omit said shoulder and the rib.

By cutting away the button. E and the lower part of the stem 1 and prolonging the cross pin E out through a suitable slot made in the side, or, rather, the front of the lock-case, my securing-block A is readily adapted for appli cation to mortise-locks, as well as to riin-loeks, for which latter form I have shown the same in the drawings to be adapted, and described it in the papers. A corresponding slot in the ineasing-wood is of course necessary in addition to that in the case.

\Vhat I claim as my invention, and f or which I desire Letters Patent, is as follows, to wit:

1. In a lock, the combination, with the case and thebolt, of the securing-block A, having the face C and the depression 0, and means for securing said block, whereby the lock-key can be firmly held and the key-hole tightly closed, for the purpose set forth.

2. In a lock, the combination, with the lockease and the bolt, of the securing-block mova ble upon the lower rim of the case and having 'the slot A therein, the button. E, having its stem extend up into said slot, and provided with project-ions engaging, when depressed, with portions of the case, and the spiral spring S, mounted on the upper part of said stem and abutting against the upper wall of said slot, for the purpose specified.

3. In alock, the combination, with the lockcase having the central]y-contracted slot F in the lower rim thereof, of the bolt, the securingblocl: movable upon said rim and the stem vertically movable in said securing-block and having the shoulders E", adapted to engage the slot, substantially as and for the purpose set forth.

4. Inalock, the combination, with the lock case and the bolt, the lower rim of the ease having the centrally-contraeted slot 1', of the securing-block A, having the sloping face 0 and depression 0, and the vertical transverse slot A of the button 1G, having the stem 15, provided with the shoulder E, said stem extending through said slot F up into said slot A the crosspin E", for preventing the withdrawal of said stem, and the spiral spring S, mounted upon the upper portion of said stem and abutting against the upper wall of the slot A", substantiall as and for the purpose set forth.

In testimony that I claim the tbregoing invention I have hereunto set my hand this 13th day of Jul y, in the year 1886.

CHARLES R. UHLMANN.

\Vitnesses:

A. B. UPIIAM, A. KEITHLEY. 

